Armadimon vs Isshin: who would win?

Isshin favored — Slight edge (~55%)

Armadimon · Digimon · Digmon

Tier

6-C

Attack Potency

Wall Level

Speed

Massively Hypersonic+, up to Relativistic

Durability

Island Level

Isshin · Undead Unluck · Base

Tier

HIGH 7-A

Attack Potency

Large Mountain Level

Speed

High Hypersonic, up to Massively Hypersonic+

Durability

Large Mountain Level

A heuristic estimate from normalized VS Battles Wiki stats: tier, attack potency, speed and durability.